Deconstructing Disk Velocity Distribution Functions in the Disk-Mass Survey
Abstract
We analyze integral-field ionized gas and stellar line-of-sight kinematics in the context of determining the stellar velocity ellipsoid for spiral galaxies observed by the Disk-Mass Survey. Our new methodology enables us to measure, for the first time, a radial gradient in the ellipsoid ratio sigmaz / sigmaR. Random errors in this decomposition are 15% at two disk scale-lengths.
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